Primary production enhancement by typhoon in Western North Pacific over a decade from 1998 to 2007
Abstract
The purpose of this study was to investigate enhancement of primary production by typhoon in Western North Pacific. We evaluated primary production enhancement by 199 typhoons using SeaWiFS data over a decade from 1998 to 2007. About 60% of these typhoons induced primary production enhancement and its average value was 61.2×10^9 gC per event. Several typhoons have very large enhancement, particularly typhoon Ketsana in 2003 recorded 727×10^9 gC per event though 89% of typhoons have weak enhancement (<100 ×10^9 gC per event). The primary production enhancement was larger when moving speed of typhoon was slower. The primary production enhancement was induced even 1000hPa typhoon if moving speed were nearly zero. And the primary production enhancement was also larger when pressure of typhoon was lower. However, the primary production enhancement was not increase less than 930hPa. The enhancement value was large when range of pressure was 940 to 960 hPa and moving speed was less than 6 m/s. The annual primary production enhancement by typhoon changed year by year, its range was 61×10^9 to 1600×10^9 gC per year. Annual average enhancement of primary production by typhoon was 539×10^9 gC per year, which only accounts for <0.6% of the total annual primary production. Relationship moving speed of typhoon, pressure of typphon and primary production enhancement by typhoon. Size of circle means magnitude of primary production enhancement.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2010
- Bibcode:
- 2010AGUFM.B31C0332T
- Keywords:
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- 0315 ATMOSPHERIC COMPOSITION AND STRUCTURE / Biosphere/atmosphere interactions